Final answer:
The correct verb conjugation to complete the sentence is 'pierde'.
Step-by-step explanation:
The correct verb conjugation to complete the sentence is pierde. The sentence should be:
Ella pierde el partido de fútbol.
The verb 'pierde' is the third person singular form of the verb 'perder' which means 'to lose' in Spanish. In this sentence, 'ella' (she) is the subject and 'el partido de fútbol' (the soccer game) is the direct object.
Learn more about Spanish verb conjugation